AFAIR "VMC Descent/Climb Through" is a procedure used when you don't feel like vectoring to 5 miles to get separation and the pilot requests it, has the other in sight, by day yadda yadda yadda (as per Delay Undet). It is not coupled to an approach of some type be it Visual-, VMC- or IFR-Approach. That said, I do not hold an App rating of any kind so I could be smoking some good S%$T.